Table 1

Comparison of characteristics of eligible population and participants

EligibleRefused/ not foundQuestionnaire completedSerum sample collected
No1419 (100%)172 (12.1%)1247 (87.9%)1078 (76.0%)
Mean age22.824.022.722.8
% male42.842.442.942.5
% age1410 (100%)164 (11.6%)1247 (87.9%)1078 (76.0%)
    15–1933.228.135.434.1
    20–2424.722.024.926.2
    25–3022.723.822.422.3
    30–3419.426.217.317.5
100100100100
% ethnicity1419 (100%)172 (12.1%)1247 (87.9%)1078 (76.0%)
    Jola63.972.762.663.7
    Mandinka15.49.916.216.0
    Fula8.210.57.97.7
    Others12.57.013.312.6
100100100100